A simple example of Python3 socket synchronous communication

This article gives an example of Python3 socket synchronous communication. To share for your reference, specific as follows:

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1 server, 1 client, and is blocked, can only accept 1 client connection and communication at a time oh.

The client sends' bye' to end communication with the server. If it sends 'shutdown', the server will shut itself down!

Server code:

from socket import *
from time import ctime
HOST = ''
PORT = 21567
BUFSIZE = 1024
ADDR = (HOST, PORT)
tcpSerSock = socket(AF_INET, SOCK_STREAM)
tcpSerSock.bind(ADDR)
tcpSerSock.listen(5)
quit = False
shutdown = False
while True:
  print('waiting for connection...')
  tcpCliSock, addr = tcpSerSock.accept()
  print('...connected from: ', addr)
  while True:
    data = tcpCliSock.recv(BUFSIZE)
    data = data.decode('utf8')
    if not data:
      break
    ss = '[%s] %s' %(ctime(), data)
    tcpCliSock.send(ss.encode('utf8'))
    print(ss)
    if data == 'bye':
      quit = True
      break
    elif data == 'shutdown':
      shutdown = True
      break
  print('Bye-bye: [%s: %d]' %(addr[0], addr[1]))
  tcpCliSock.close()
  if shutdown:
    break
tcpSerSock.close()
print('Server has been

Client code:

from socket import *
HOST = 'localhost'
PORT = 21567
BUFSIZE = 1024
ADDR = (HOST, PORT)
tcpCliSock = socket(AF_INET, SOCK_STREAM)
tcpCliSock.connect(ADDR)
while True:
  data = input('>')
  if not data:
    continue
  print('input data: [%s]' %data)
  tcpCliSock.send(data.encode('utf8'))
  rdata = tcpCliSock.recv(BUFSIZE)
  if not rdata:
    break
  print(rdata.decode('utf8'))
  if data == 'bye' or data == 'shutdown':
    break
tcpCliSock.close()

For more information about Python, please visit Python Socket Programming Skills summary, Python Data Structure and Algorithm Tutorial, Python Function Usage Skills Summary, Python String Manipulation Skills Summary, Python Introduction and Advanced Classic Tutorial and Python File and Directory Manipulation Skills Summary.

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